Three more teams of the UK's most talented railway modellers compete for a place in the semi-finals. A combo dubbed Who's Counting Rivets hopes to impress the judges with a layout featuring gadgets galore, pyrotechnics and a multitude of mini-animations. Retired traditionalists the Three Millers plan to re-enact a dramatic railway scene from 1950s Holland, while the Titfield Thunderbolts attempt to stage an action adventure in the jungle involving a plane crash and a volcano.